Seems like something not good with your Purge Solenoid Valve. Cleaning it would be a good choice as per your thoughts? Great! We are here with everything to make your valve work properly again.
Periodic cleaning is always required for the Purge Valve, it’s due to the Accumulated Debris which gets inside along with the air in your purge solenoid. This debris is most precisely called carbon build-up.
You must have tried to clean it by yourself by applying too much effort, but that wasn’t sufficient to clean it completely. It’s NOT only about the effort but also about the WAY.
Well, before moving ahead with the best methods to clean these valves, you must know that cleaning this Purge Valve will enhance its efficiency and also increase its life.
So, Let’s take the first step into this read by answering the most common question-
How To Clean Purge Solenoid Valve Without Opening It?
Yes, you heard it right “Without Opening It“, but for this, you have to follow each of the steps we listed in an ordered manner. A rush could damage your Solenoid Valve.
So, here are is the complete step-by-step process to clean your Purge Solenoid Valve-
The very first thing you have to do is to spray a good amount of MAF cleaner or we can say the Carbon Cleaner.
The spray should be made in both tubes of the purge solenoid valve slowly to let the debris absorb it.
Now, you have to simply cover both the ends of the solenoid valve using your fingers and give a hard shake.
Don’t let the ends uncovered, using any plastic or other material just cover the ends and wait for a few minutes for the cleaner to remove the stuck dirt.
The next thing you have to do is to uncover the valve tube ends and allow the complete liquid to drain out. The darker the liquid the more it absorbed dirt, charcoal, and other debris.
As per our recommendation, you must repeat the first two steps many times to have a fine cleaning. As a sign, you can stop continuing this process when the liquid leaves the Purge Valve clean.
In some cases the liquid can come clean from the valve for the first time, this doesn’t show the valve is completely clean but probably because the liquid isn’t clogged by dirt or debris.
Next, you have to spray a contact cleaner inside the valve’s connector that connects both ends and also on the car switch.
Lastly, you have to leave everything for a while to get dry.
This was all about cleaning your Purge Solenoid Valve, now have a look on-
How to clean EVAP Canister Purge Valve?
It may sound similar, but it’s not. Many of you might be facing problems while cleaning your Evaporative Canister Purge Valve.
This is because many of you will think the same process, we applied in the Solenoid Purge Valve cleaning can be used here also.
But, that’s not true as both these valves are different with each other having their individual specification, hence, a different cleaning is required in both cases.
WHAT’S THE MAIN DIFFERENCE BETWEEN BOTH?
The evaporative canister Purge Valve consists of a filter inside it that acts like a sponge and absorbs excess gas fumes.
However, overtime such absorption leads to debris build-up. This can result in slowing down the mechanism of the system which needs to be cleaned for a smooth working.
So, here comes the bed to clean this evaporative canister purge valve. We can help you out effectively cleaning this valve by following the steps listed below-
- Take out the Canister Valve at first and then remove the bottom and top lines from it using a flat-head screwdriver or any other sharp and similar tool.
If needed, use a socket and ratchet to remove or take the canister out of the bracket.
- Now, simply put the canister on a flat and dry surface. Here comes the need for an Air Compressor, just switch on the air compressor and allow the meter to touch the 50 PSI mark.
High pressure is needed for deep cleaning, but don’t increase it beyond 50 PSI as this will harm your valve.
- Once it touches the 50 PSI mark, then leave it constant.
- The next thing you have to do is in the outer vent control valve pipe that you can see at the top of the canister.
Just insert the rubber tip of the air line nozzle fitting after which the pipe gets partitioned from the other two top-pipes.
- Place your fingertips over the outlet of the two pipes on the top of the canister (mentioned in the former step) using one hand.
- After this simply allow the Air Compressor to supply a pressure of 50 PSI into the evaporative canister. This should be made by pulling the air release trigger present on the air nozzle with the other hand.
- Repeat the above listed steos 1-2 times, then finally remove fingers from the top-pipes. Now, place it over the front opening of the pipe on the canister’s bottom.
- Tap the Purge Valve on a solid surface to let the stick dirt or debris fall. Lastly, place the top lines back in their places which you removed earlier.
NOW, HOW TO KNOW THAT THE CANISTER HAS BEEN CLEANED PROPERLY?
Use your finger to check whether air is coming out from the bottom of the pipe.
This ensures that the canister is allowing airflow from top to bottom and hence, it has been cleaned properly.
That’s all about cleaning your EVAP Purge Valve. However, many people are confused regarding the symptoms that a bad valve hints.
So, Here’s the complete answer to-
What Are The Symptoms Of A Bad Purge Valve?
It’s very important to catch the signs your car is making when the Purge Valve in it is not in a good condition.
You must be curious about these Signs or Symptoms, right? We will explain everything to you in detail and help you make things fixed before it gets worse. So, Here are EVAP purge solenoid symptoms that you will observe when it is not in a good condition.
- Rough Idle – If somehow your canister purge valve fails and sticks open then for sure it will result in a vacuum leak. Thus leak will affect your car’s engine idle speed and performance.
- Poor Engine Performance- This can be easily monitored when you see your car is not generating sufficient power even after a good acceleration.
Engine performance can also be measured using other methods like the speed test.
- Difficulty Starting- If there is a vacuum leak created as a result of any problem with your car’s canister purge solenoid, then you may notice it’s getting difficult to start your car.
It’s because a vacuum leak will permit the flow of unmetered air into the engine, which eventually results in disturbing the air-fuel ratio and thus cause ignition issues.
- Check Engine Light Comes On- This is an inbuilt feature in which the Check Engine Light gets turned on to indicate any problem occurred.
Well, the Check Engine Light can also get turned on a wide range of problems, so we recommend you have a complete scan of your vehicle for safe and quality driving.
- Low Fuel Economy- This can be figured out from the fuel-economy difference compared to the earlier one or from the on-paper report. In this, the fuel vapour gets vented off from the EVAP canister.
Now, you know all major symptoms your Purge Valve will make, but if it does not then-
How to Test Purge Valve?
To test the Purge Valve there is one common and most effective method in which the procedure varies depending on the car make and model.
Well, it’s because the purge valve is normally closed, or we can say in an off condition. It’s designed to remain closed when there’s no voltage and gets turned on when the voltage is applied.
Here How It Works?
If you observe the service manual given along with the car , you will find that it’s mentioned there- A valve needs to be checked if the applied voltage to the purge valve terminals produces an voice, click where the applied voltage should be given using a 9-volt battery.
For example- A purge valve does produce an audible click, you must check properly if the purge valve is in a closed condition and is not having any leaks. For this, use a hand-held vacuum pump and simply apply a low set vacuum to the purge valve.
If an immediate vacuum drop is observed, then the purge valve and check if it is sealed properly and there’s the only way left is to replace it.
Note- In case the Car Engine Light gets on and after a scan, the code observed is “P0446” then it’s clearly hinting out the main problem is- Evaporative Emission Control System Vent Control Circuit Malfunction.
You tested the EVAP system and found your Purge Valve is having a slow leak, replace it and your problem is fixed now.
For more clarity, CHECK OUT THIS VIDEO
Frequently Asked Questions
- How do I know if my purge solenoid is bad?
If your canister purge solenoid is not in a good condition then it will show some signs as an indication, which you have to observe. Mainly in a defective condition, it will show five major signs. These are-
1) Check Engine Light:
2) Rough Idle:
3) Trouble Starting Car:
4) Poor Engine Performance:
5) Emissions Test Failure
- Can you fix a purge valve?
Yes, you can easily fix your car’s canister purge valve and the fixing or replacement isn’t too expensive. The repair or replacement price will somewhat range between $100 – $150.
In case you observe any of the defect listed caused due to a bad purge valve then get it diagnosed soon.
- How do you test a purge solenoid valve?
You can easily test your Purge Solenoid Valve using the multimeter named Aptly. It’s quite handy and can accurately measure the voltage, resistance, and current.
This is because the multimeter tests the Purge Valve by measuring the resistance between the two terminals. Although the procedure may carry from car to car, the concept remains the same.
- What is the difference between a purge valve and purge solenoid?
Getting confused with these two is common. Let us make you clear about the main difference between the two is that the canister purge valve is an important component (Discussed in our read) of your Evaporative Emission Control (EVAP) system.
Whereas the Purge Solenoid is an electrically operated emission control device used in your car in the form of a solenoid.
The valve may be a small component but can cause many major issues when not in good condition. The valve may be a small component but can cause many major issues when not in good condition. Cause, Testing, and Fixing are the three main things you must know about this Valve. And hopefully all these we have elaborated in our read with clearing out some common confusions that arise.
Hope our read helped you out clearing all your doubts related to Purge Valve and Solenoid Purge Valve Cleaning A Purge.